The document provides information on various injuries and clinical conditions that can affect the lower limbs. It discusses fractures of the hip bone, femur, tibia, fibula, and bones of the foot. Other topics covered include knee injuries, hip dislocations, genu varum and valgum, patellofemoral syndrome, slipped capital femoral epiphysis, varicose veins, deep vein thrombosis, and nerve injuries. Common physical exam maneuvers are also described such as assessing pulses in the dorsalis pedis and posterior tibial arteries and eliciting reflexes like the calcaneal tendon reflex.

1. LOWER LIMB
CLINICALANATOMY
Abbas A. A. Shawka

2. CutaneousInnervation

3. Bones injuries
• Knee, leg, and foot injuries are the most common lower
limb injuries.
• Injuries to the hips make up less than 3% of lower limb
injuries.
• Adolescents are most vulnerable to these injuries
because of the demands of sports on their maturing
musculoskeletal systems.

4. Injuries of HipBone
• Fractures of the hip bone are referred to as pelvic
fractures.
• The term hip fracture is most commonly applied
(unfortunately) to fractures of the femoral head, neck, or
trochanters.

5. Femoral neck fracture
• Fracture of the neck of the femur often disrupts the blood supply to
the head of the femur.
• The medial circumflex femoral artery supplies most of the blood to the
head and neck of the femur the blood supplied to the femoral head
through the artery to the ligament of the femoral head may be the only
remaining source of blood to the proximal fragment.
• The proximal fragment may undergo avascular necrosis
• Mostly common in individuals over 60 and in women as a result of
osteoporosis.

6. Hip dysplasia
• Congenital dislocation of the hip joint.
• It affects more girls and
is bilateral in approximately
• half the cases.
• The affected limb appears (and functions as if) shorter because
the dislocated femoral head is more superior than on the
normal side, resulting in a positive Trendelenburg sign (hip
appears to drop to one side during walking). Inability to abduct
the thigh is characteristic of congenital dislocation.

7. Hip dislocation
• Posterior dislocations are most common.
• The fibrous layer of the joint capsule ruptures
inferiorly and posteriorly, allowing the femoral
head to pass through the tear in the capsule and
over the posterior margin of the acetabulum onto
the lateral surface of the ilium.
• Occurred when the hip is
• flexed, adducted, and medially rotated
• shortening and medially rotating the affected
limb.
• Because of the close relationship of the sciatic
nerve to the hip joint, it may be injured (stretched
and/or compressed) during posterior dislocation
or fracture–dislocation of the hip joint.

8. Genu varum & Genuvalgum

9. Pattelofemoralsyndrome
• weakness of the vastus medialis
predisposes the individual to patellofemoral
dysfunction and patellar dislocation.
Patella dislocation :
• When the patella is dislocated, it nearly always dislocates
laterally.
• Patellar dislocation is more common in women, presumably
because of their greater Q-angle, which, in addition to
representing the oblique placement of the femur relative to the
tibia, represents the angle of pull of the quadriceps relative to the
axis of the papatella and tibia.
• the term Q-angle was actually coined in reference to the angle of
pull of the quadriceps).

10. Ange nation
• When the angle of inclination is decreased, the condition
is coxa vara
• when it is increased, it is coxa valga

11. • Vera : distal element of bone deviates toward midline.
• Valga : distal element deviates away from midline.

12. Dislocated Epiphysis of Femoral Head
• During abduction and lateral rotation.
• Usually lead to coxa vera.

13. Femoral Fractures

14. Spiralfracture cause by torsional force rather thandirect force

15. Tibial Fractures
• The tibial shaft is narrowest at the junction of its middle
and inferior thirds, which is the most frequent site of
fracture. Unfortunately, this area of the bone also has the
poorest blood supply. Because its anterior surface is
subcutaneous.
• most common site for a compound fracture ( open )

17. `

18. Fibula Fractures
Actually, fibula is not very
important in biomechanics of
limb, it
lower
muscle attachment
treatment of its fractures
is only for
, so
is
usually due to pain.

19. Bone Graft
• If a part of a major bone is destroyed by injury or disease, the limb
becomes useless. Replacement of the affected segment by a bone
transplant may avoid amputation.
• The fibula is a common source of bone for grafting. Even after a
segment of the shaft has been removed, walking, running, and
jumping can be normal. Awareness of the location of thenutrient
foramen in the
• fibula is important when performing free vascularized fibular transfers.
Because the nutrient foramen is located in the middle third of the
fibula in most cases
• Because of its extensive subcutaneous location, the anterior tibia is
accessible for obtaining pieces of bone for grafting in children; it is
also used as a site for intramedullary infusion in dehydrated or
shocked children.

21. Fracture of Calcaneus
• A hard fall onto the heel, from a ladder for example, may fracture the
calcaneus into several pieces, producing a comminuted fracture .
• A calcaneal fracture is usually disabling because it disrupts the subtalar
(talocalcaneal) joint, where the talus articulates with the calcaneus

23. Fractures of TalarNeck
• Fractures of the talar neck (Fig. B5.8B) may occur during severe
dorsifl exion of the ankle (e.g., when a person is pressing extremely
hard on the brake pedal of a vehicle during a head-on collision).

24. Fractures of Metatarsals
•Metatarsal can be fractured when
1- heavy object fall on them
2 in female dancer ballet
3 due to prolonged walking

25. Varicose Veins, Thrombosis, andThrombophlebitis
• Frequently, the great saphenous vein and its tributaries become varicose
(dilated so that the cusps of their valves do not close).
• Varicose veins are common in the posteromedial parts of the lower limb and
may cause discomfort

26. DVT
• Deep venous thrombosis (DVT) of one or more of the deep veins of the lower limb is
characterized by swelling, warmth, and erythema (inflammation and infection). Venous
stasis (stagnation) is an important cause of thrombus formation.
• Venous stasis can be caused by:
1Incompetent, loose fascia that fails to resist muscle expansion, diminishing the
effectiveness of the musculovenous pump.
2 External pressure on the veins from bedding during a prolonged hospital stay or from a
tight cast or bandage.
3Muscular inactivity (e.g., during an overseas aircraft flight). DVT with inflammation
around the involved veins (thrombophlebitis) may develop.
• A large thrombus that breaks free from a lower limb vein may travel to a lung, forming
a pulmonary thromboembolism (obstruction of a pulmonary artery). A large embolus
may obstruct a main pulmonary artery and may cause death.

27. Saphenous vein bypass
• The great saphenous vein is sometimes used for coronary arterial bypasses
because
• (1) it is readily accessible
• (2) a sufficient distance occurs between the tributaries and the perforating
veins so that usable lengths can be harvested, and
• (3) its wall contains a higher percentage of muscular and elastic fi bers than
do other superficial veins.

28. Saphenous vein cutdown
• can always be located by making a skin incision anterior to the
• medial malleolus .
• This procedure, called a saphenous cutdown, is used to insert
a cannula for prolonged administration of blood, plasma
expanders, electrolytes, or drugs.
• The saphenous nerve accompanies the great saphenous vein
anterior to the medial malleolus. Should this nerve be cut
during a saphenous cutdown or caught by a ligature during
closure of a surgical wound, the patient may complain of pain
or numbness along the medial border of the foot.

29. Enlarged Inguinal LymphNodes
• When inguinal lymph nodes are enlarged, their entire field of
drainage—the trunk inferior to the umbilicus, including the
perineum, as well as the entire lower limb—should be
examined to determine the cause of their enlargement.
• In female patients, the relatively remote possibility of
metastasis of cancer from the uterus should also be considered
because some lymphatic drainage from the uterine fundus may
flow along lymphatics accompanying the round ligament of the
uterus through the inguinal canal to reach the super ficial
inguinal lymph nodes. All palpable lymph nodes should also be
examined.

30. Regional Nerve Blocks ofLower Limbs
• Interruption of the conduction of impulses in peripheral
nerves (nerve block) may be achieved by making
perineural injections of anesthetics close to the nerves
whose conductivity is to be blocked.
• The femoral nerve (L2–L4) can be blocked 2 cm inferior to
the inguinal ligament, approximately a finger’s breadth
lateral to the femoral artery. Paresthesia (tingling, burning,
tickling) radiates to the knee and over the medial side of
the leg if the saphenous nerve (terminal branch of
femoral) is affected.

31. Root Nerves Injury ( Sensation)

32. Quadriceps Paralysis
• A person with paralyzed
quadriceps muscles cannot
extend the leg against
resistance and usually presses
on the distal end of the thigh
during walking to prevent
inadvertent flexion of the knee
joint.
• Weakness of the vastus
medialis or vastus lateralis,
resulting from arthritis or
trauma to the knee joint, can
result in abnormal patellar
movement and loss of joint
stability.

33. Patella Fracture
• Due to : ( Transverse
fracture )
1. Direct blow
2. Sudden contraction of
quadriceps muscle
• Proximal segment will go
superiorly with quadriceps
tendon.
• Distal segment will stay with
patellar ligament.

34. Patellar tendon Reflex
Examination for L2-L4

35. Transplantation of Gracilis
• Because the gracilis is a relatively weak member of the
adductor group of muscles, it can be removed without
noticeable loss of its actions on the leg.
• Surgeons often transplant the gracilis, or part of it, with its
nerve and blood vessels to replace a damaged muscle in
the hand, for example. Once the muscle is transplanted, it
soon produces good digital flexion and extension.
• Freed from its distal attachment, the muscle has also
been relocated and repositioned to create a replacement
for a nonfunctional external anal sphincter.

36. Groin Pull
• Tearing in muscle of flexor and ( 0r )
adductor compartment of the thigh due to
strain, stretching, probably some tearing of
the proximal attachments of the
anteromedial thigh muscles have occurred.

37. Rider’s strain
• Injury of adductor longus muscle in horseback riders.

38. Palpation, Compression, and Cannulation of
FemoralArtery
• The initial part of the femoral artery, proximal to the branching of the
profunda femoris artery, is superficial in position, making it especially
accessible and useful for a number of clinical procedures.

39. Femoral Hernia
• The femoral ring is a weak area in th lower
anterior abdominal wall that is the site of a
femoral hernia, a protrusion of abdominal
viscera (often a loop of small intestine)
through the femoral ring into the femoral
canal.
• A femoral hernia is more common in women
than in men (in whom inguinal hernias are
more common)
• it can enlarge by passing through the
saphenous opening into the subcutaneous
tissue of the thigh.
• Strangulation of a femoral hernia may occur
and interfere with the blood supply to the
herniated intestine, and vascular impairment
may result in death of the tissues.

40. Replaced orAccessory ObturatorArtery
• branch of the inferior epigastric
artery either takes the place of
the obturator artery (replaced
obturator artery) o r joins it as
an accessory obturator artery
in approximately 20% of people.
• Surgeons placing staples during
endoscopic repair of both
inguinal and femoral hernias are
vigilant concerning the possible
presence of this common arterial
variant.

41. Hamstring injury
• Hamstrings strains (pulled and/or torn hamstrings) are common in
athletes.
• The muscular exertion required to excel in these sports may tear
part of the proximal attachment of the hamstrings to the ischial
tuberosity.

43. Injury to Superior GlutealNerve
Paralysis of
1 gluteus medius,
2 gluteus minimus,
3 tensor fasciae latae

44. Sciatic
nerveinjury

45. Intragluteal injection

46. Tibial andcommon
fibular nervesinjury

47. • Because of its superficial and lateral position, the common fibular
nerve is the nerve most often injured in the lower limb.
• Lead to foot drop.
What do this
picture indicate ?!

48. What is the most structure that
have injured in this X-Ray ?!

49. • Injury to the tibial nerve is uncommon because of its
protected position in the popliteal fossa; however, the
nerve may be injured by deep lacerations in the fossa.
• People with a tibial nerve
injury are unable to
plantarflex their ankle or
flex their toes.
• Loss of sensation also
occurs on the sole of the
foot.

50. Absence of planteriflexion
1. the muscles of the calf are paralyzed,
2. the calcaneal tendon is ruptured,
3. normal push-off is painful,
• a much less effective and efficient push-off (from the midfoot) can still be
accomplished by the actions of the gluteus maximus and hamstrings in
extending the thigh at the hip joint and the quadriceps in extending the
knee.
• Because push-off from the forefoot is not possible (in fact, the ankle will
be passively dorsiflexed as the body’s weight moves anterior to the foot),
those attempting to walk in the absence of plantarflexion often rotate the
foot as far laterally (externally) as possible during the stance phase to
disable passive dorsiflexion and allow a more effective push-off through
hip and knee extension exerted at the midfoot.

51. Shin Splints
• Shin splints—edema and pain in the area of
the distal two thirds of the tibia—result from
repetitive microtrauma of the tibialis anterior
(TA), which causes small tears in the
periosteum covering the shaft of the tibia
and/or of fleshy attachments to the overlying
deep fascia of the leg. Shin splints are a mild
form of the anterior compartment syndrome.
Shin splints commonly occur during traumatic
injury or athletic overexertion of muscles in
the anterior compartment, especially TA.
Muscles in the anterior compartment swell
from sudden overuse, and the edema and
muscle–tendon inflammation reduce the
blood flow to the muscles. The swollen
muscles are painful and tender to pressure.

52. Gastrocnemius Strain
It is caused by overstretching the muscle
by concomitant full extension of the
knee and dorsiflexion of the ankle joint.

53. Compartment syndrome
• Compartment syndrome Compartment
syndrome occurs
swelling within a
when there is
fascial enclosed
muscle compartment in the limbs.
Typical causes include limb trauma,
intracompartment hemorrhage, and
limb compression.
• As pressure within the compartment
elevates, capillary blood flow and
tissue perfusion is compromised, which
can ultimately lead to neuromuscular
damage if not treated.

54. Saphenous nerve injury
The saphenous
accompanies the
nerve
great
saphenous vein in the leg. Should
this nerve be injured or caught by
a ligature during closure of a
surgical wound, the patient may
complain of pain, tingling, or
numbness (paresthesia) along the
medial border of the foot.

55. Dorsalis pedis pulse withfootslightlydorsiflexion

56. Posterior tibialpulse
• it is important when palpating this pulse to have the person relax the
retinaculum by inverting the foot. Failure to do this may lead to the
erroneous conclusion that the pulse is absent.

57. Calcaneal tendon reflex
The ankle (jerk) reflex is elicited by
striking the calcaneal tendon briskly
with a reflex hammer while the
person’s legs are dangling over the
side of the examining table. This
tendon reflex tests the S1 and S2
nerve roots. If the S1 nerve root is
cut or compressed, the ankle reflex
is virtually absent.

58. Calcaneal tendon rupture
• Calcaneal tendon rupture is often sustained by people with a history
of calcaneal tendinitis. After complete rupture of the tendon,passive
dorsiflexion is excessive, and the person cannot plantarflex against
resistance.

59. Calcaneal bursitis

60. Gait cycle

61. Plantar fascitis
• Straining and inflammation of the plantar aponeurosis, a condition
called plantar fasciitis, may result from running and high-impact
aerobics, especially when inappropriate footwear isworn.
• It causes pain on the plantar surface of the heel and on the
medial aspect of the foot. Point tenderness is located at the
proximal attachment of the plantar aponeurosis to the medial
tubercle of the calcaneus and on the medial surface of this bone.
• The pain increases with passive extension of the great toe and may
be further exacerbated by dorsiflexion of the ankle and/or weight
bearing.

62. Calcaneal spur
• A calcaneal spur (abnormal bony process) protruding from themedial
tubercle has long been associated with plantar fasciitis and pain on
the medial side of the foot when walking.
• However. many asymptomatic patients are found to have such spurs.

63. Sural nerve graft
• Pieces of the sural nerve are
often used for nerve grafts in
procedures such as repairing
nerve defects resulting from
wounds. The surgeon is usually
able to locate this nerve in
relation to the small saphenous
vein.

64. Babinski's sign

65. Medial plantar nerve compression
• Medial plantar nerve compression may occur during repetitive
eversion of the foot (e.g., during gymnastics and running).
Because of its frequency in runners, these symptoms have
been called “jogger’s foot.”
• The symptoms of Jogger’s foot will have a gradual onset
and may include:
1. Burning heel pain.
2. Aching and tenderness on the inside of the foot.
3. Altered sensation on the bottom of the foot behind the big toe
4. Feeling of ‘giving-way’ when running.

66. Relative position of muscles acting on hip
Circular Zones =
The zones represent the position of
origin of functional groups relative
to center of femoral head in
acetabulum (point of rotation). Pull is
applied on the femur (femoral
trochanters or shaft) from these
positions.
Colored Arrows =
The curved arrows show the direction
of rotation of femoral head and neck
caused by activity of extensors and
flexors. The short arrows indicate the
direction of movement of the femoral
neck and greater trochanter caused
by activity of the lateral/medial rotators
and abductors/adductors.

67. Rotators of hipjoint

68. Knee anatomy

69. Knee joint injury
• If a force is applied against the knee when the foot cannot move, ligament
injuries are likely to occur.
• The firm attachment of the MCL to the medial meniscus is of clinical
significance because tearing of this ligament frequently results in
concomitant tearing of the medial meniscus. The injury is frequently caused
by a blow to the lateral side of the extended knee or excessive lateral
twisting of the flexed knee, which disrupts the MCL and concomitantly tears
and/or detaches the medial meniscus from the joint capsule.

70. • The ACL, which serves as a pivot for rotatory movements of the knee,
is taut during flexion and may also tear subsequent to the rupture of
the MCL. ACL rupture, one of the most common knee injuries in
skiing accidents, for example, causes the free tibia to slide anteriorly
under the femur, a sign known as the anterior drawer sign

71. • Although strong, PCL rupture may occur when a person lands on the
tibial tuberosity when the knee is flexed. PCL ruptures usually occur
in conjunction with tibial or fibular ligament tears. The posterior
drawer sign, in which the free tibia slides posteriorly under the fixed
femur, occurs as a result of PCL rupture

72. Bursitis in KneeRegion
• Prepatellar bursitis (“housemaid’s knee”) is usually a friction bursitis
caused by friction between the skin and the patella.
• Subcutaneous infrapatellar bursitis results from excessive friction
between the skin and the tibial tuberosity; the edema occurs over the
proximal end of the tibia
• Deep infrapatellar bursitis results in edema between the patellar
ligament and the tibia, superior to the tibial tuberosity.
• The suprapatellar bursa communicates with the articular cavity of the
knee joint; consequently, abrasions or penetrating wounds (e.g., a
stab wound) superior to the patella may result in suprapatellar bursitis
caused by bacteria entering the bursa from the torn skin. The infection
may spread to the knee joint.

73. Ankle injury
• The ankle is the most frequently injured major
joint in the body
inversion injury. involving twisting of
• A sprained ankle is nearly always an
the
weight-bearing plantarflexed foot.
• The anterior talofibular ligament (part of the
lateral ligament) is most commonly torn during
ankle sprains, either partially or completely,
resulting in instability of the ankle joint.
• The calcaneofibular ligament may also be
torn.

74. Dislocation of ankle
• dislocation of the ankle occurs when the foot
is forcibly everted.
• This action pulls on the extremely strong medial
ligament, often tearing off the medial malleolus
• Talus moves laterally shearing off the lateral
malleolus or, more commonly, breaking the
fibula superior to the tibiofibular syndesmosis. If
the tibia is carried anteriorly, the posterior
margin of the distal shearing off the lateral
malleolus or, more commonly,breaking the fibula
superior to the tibiofibular syndesmosis. If the
tibia is carried anteriorly, the posterior margin of
the distal end of the tibia is also sheared off by
the talus.end of the tibia is also sheared off by
the talus.

75. Hallux Valgus
• Hallux valgus is a foot deformity caused by degenerative joint disease.
• it is characterized by lateral deviation of the great toe (L. hallux).
• In some people, the deviation is so great that the first toe overlaps the
second toe.
• These individuals are unable to move their 1st digit away from their 2nd
digit because the sesamoid bones under the head of the 1st metatarsal
are displaced and lie in the space between the heads of the 1st and 2nd
metatarsals.
• In addition, a subcutaneous bursa may form owing to pressure and
friction against the shoe. The thickened bursa (often inflamed and tender)
and/or reactive hyperostosis of the head of the 1st metatarsal results in a
protuberance called
• a bunion.

77. Pes Planus (Flatfeet)
• Acquired flatfeet (“fallen arches”) are likely to be secondary to
dysfunction of the tibialis posterior owing to trauma, degeneration
with age, or denervation.
• In the absence of normal passive or dynamic support, the plantar
calcaneonavicular ligament fails to support the head of the talus.
Consequently, the talar head displaces inferomedially and becomes
prominent.
• As a result,
• some flattening of the medial longitudinal arch occurs, along with lateral
deviation of the forefoot
• Flatfeet are common in older people, particularly if they undertake much
unaccustomed standing or gain weight rapidly, adding stress on the
muscles and increasing the strain on the ligaments supporting the
arches.

78. flatffeet

80. SectionalAnatomy

84. Keys

88. Keys

90. Additional

92. Muscles